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package EventStore::Tiny::DataEvent; |
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use parent 'EventStore::Tiny::Event'; |
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use strict; |
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use warnings; |
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use Class::Tiny { |
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data => sub {{}}, |
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}; |
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sub new_from_template { |
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my ($class, $event, $data) = @_; |
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# "clone" |
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return EventStore::Tiny::DataEvent->new( |
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name => $event->name, |
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transformation => $event->transformation, |
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data => $data, |
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); |
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} |
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# Lets transformation work on state by side-effect |
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sub apply_to { |
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my ($self, $state, $logger) = @_; |
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# Apply the transformation by side effect |
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$self->transformation->($state, $self->data); |
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# Log this event, if logger present |
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$logger->($self) if defined $logger; |
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# Returned the same state just in case |
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return $state; |
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} |
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# Return a one-line summary of this event |
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sub summary { |
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my $self = shift; |
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# Prepare data summary |
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my $data_summary = join ', ' => map { |
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my $d = $self->data->{$_}; |
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$d =~ s/\s+/ /g; # Summarize in-between whitespace |
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$d =~ s/^\s+//; # Get rid of leading whitespace |
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$d =~ s/\s+$//; # Get rid of whitespace in the end |
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$d =~ s/['"]+//g; # Get rid of quotes |
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$d =~ s/^(.{17}).{3,}/$1.../; # Shorten |
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"$_: '$d'" # Quoted, shortened key-value pair |
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} sort keys %{$self->data}; |
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# Retrieve event summary (without data) and inject data summary |
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my $summary = $self->SUPER::summary; |
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$summary =~ s/\)\]$/) | $data_summary]/; |
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# Done |
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return $summary; |
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} |
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1; |
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=pod |
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=encoding utf-8 |
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=head1 NAME |
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EventStore::Tiny::DataEvent |
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=head1 REFERENCE |
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EventStore::Tiny::DataEvent extends EventStore::Tiny::Event and implements the following additional attributes and methods. |
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=head2 data |
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my $ev = EventStore::Tiny::DataEvent->new(data => {id => 42}); |
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Sets concrete data for this event which will be used during application. |
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=head2 new_from_template |
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my $concrete = EventStore::Tiny::DataEvent->new_from_template( |
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$event, {id => 17} |
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); |
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Creates a new data event based on another event (usually representing an L event type which was registered before using L). The additional argument sets the new event's L attribute. |
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=head3 apply_to |
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$event->apply_to(\%state, $logger); |
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Applies this event's L to the given state (by side-effect) and its L. If a C<$logger> as a subref is given, it is used to log this application. |
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=head3 summary |
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say $event->summary; |
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Extended version of L from the parent. It features a simple L summary. |
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=head1 SEE ALSO |
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L |
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=head1 COPYRIGHT AND LICENSE |
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Copyright (c) 2018 Mirko Westermeier (mail: mirko@westermeier.de) |
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Released under the MIT License (see LICENSE.txt for details). |
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=cut |